Suppliers must provide Material Test Reports (MTRs) or Mill Test Certificates that align with international standards such as ASTM B749 (Standard Specification for Lead and Lead Alloy Strip, Sheet, and Plate Products) or BS EN 12588. For medical applications, ensure the product meets ISO 13485 quality management systems. Furthermore, because lead is a hazardous substance, ensure the supplier provides a Safety Data Sheet (SDS) and complies with RoHS/REACH regulations where applicable, especially for non-shielding industrial uses.